Syntax
=====

.. code-block:: text

    table = CALC_SPECTRE_IPM (
        ◇ MAILLAGE = mesh,
        # If: exists (" MAILLAGE ")
            ◆ EQUIPEMENT = _F (
                 ◆ NOM = text,
                 ◆ GROUP_NO = big,
                 ◆ RAPPORT_MASSE_TOTALE = float,
                 ◆ COEF_MASS_EQUIP = float,
                 ◆ FREQ_SUPPORT = float,
                 ◆ AMOR_SUPPORT = float,
                 ◆ AMOR_EQUIP = float,
                 ◆ FREQ_EQUIP = float,
              ),
        # If: not exists (" MAILLAGE ")
            ◆ EQUIPEMENT = _F (
                 ◆ NOM = text,
                 ◆ NOEUD = no,
                 ◆ RAPPORT_MASSE_TOTALE = float,
                 ◆ COEF_MASS_EQUIP = float,
                 ◆ FREQ_SUPPORT = float,
                 ◆ AMOR_SUPPORT = float,
                 ◆ AMOR_EQUIP = float,
                 ◆ FREQ_EQUIP = float,
              ),
        ◆ CALCUL =/"ABSOLU ",
                   /"RELATIF ",
        ◆ AMOR_SPEC = float,
        ◇ LIST_INST = listr8,
        ◇ LIST_FREQ = listr8,
        ◇ FREQ = float,
        ◆ NORME = float,
        # If: equal_to (" CALCUL ", 'RELATIF')
            ◆ RESU = _F (
                 ◆/TABLE = table,
                   /FONCTION = function,
                 ◆ ACCE_Z = function,
              ),
        # If: equal_to (" CALCUL ", 'ABSOLU')
            ◆ RESU = _F (
                 ◆/TABLE = table,
                   /FONCTION = function,
              ),
        ◇ TOLE_INIT = float (default: 0.001),
        ◇ CORR_INIT =/"OUI ",
                      /"NON" (by default),
    )
    
    ◆: mandatory
    ◇: optional
    : present by default
    &: together
    /: only one among
    |: several possible choices